/*-
 * Extension.java
 *
 * $LastChangedBy:  $
 * $LastChangedRevision:  $
 * $LastChangedDate:  $
 * $HeadURL: $
 *
 * Copyright (c) 2008, Stein Gunnar Bakkeby
 * All rights reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of Stein Gunnar Bakkeby nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.googlecode.attention.intention.services;

import java.io.IOException;
import java.security.AccessControlException;
import java.util.HashMap;
import java.util.Map;

import com.googlecode.attention.SMSEntry;
import com.googlecode.attention.intention.tools.SMSEntryUtils;
import com.googlecode.attention.intention.tools.SMSFormatter;
import com.googlecode.attention.sms.pdu.ConcatenatedMessage;
import com.googlecode.attention.sms.pdu.PDUElement;
import com.googlecode.attention.sms.pdu.TPDU;
import com.googlecode.attention.util.Settings;



public class Extension implements SMSListener {

  private String command;
  private String separator;
  private boolean hasSMSCInfo;
  private Map<String, ConcatenatedMessage> concatMap;
  private boolean joinConcat;
  
  public Extension(final SMSPoller poller, final Settings settings) {
    poller.addSMSListener(this);
    command = settings.getString("command_to_execute");
    separator = settings.getString("message_print_pattern_separator");
    hasSMSCInfo = settings.getBoolean("has_smsc_info");
    concatMap = new HashMap<String, ConcatenatedMessage>();
    joinConcat = settings.getBoolean("join_concatenated_messages");
  }
  
  @Override
  public void messageReceived(final SMSEntry[] entries) {
    final TPDU[] tpdus = SMSEntryUtils.convertSMSEntryToTPDU(entries,
                                                             hasSMSCInfo);
    for (final TPDU tpdu : tpdus) {
      tpdu.decode();
      
      final String commandToExecute;
      if (joinConcat && tpdu.get(PDUElement.TP_UDHI) != 0) {
        ConcatenatedMessage concat = SMSEntryUtils.parseUDH(tpdu, concatMap);
        /* concat is null if UDH and not concatenated message */
        if (concat != null && !concat.hasAllParts()) {
          continue;
        }
        final SMSFormatter formatter = new SMSFormatter();
        commandToExecute = formatter.format(command, concat, separator);
      } else {
        final SMSFormatter formatter = new SMSFormatter();
        commandToExecute = formatter.format(command, tpdu, separator);
      }
      
      try {
        final Runtime runtime = Runtime.getRuntime();
        final Process process = runtime.exec(commandToExecute);
        // TODO could log errors or redirect error output stream
      } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      } catch (AccessControlException e) {
        e.printStackTrace();
      } catch (SecurityException e) {
        e.printStackTrace();
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
  }
}
